title: Pulmonary amyloidosis in a patient with Langerhans cell histiocytosis: diagnostic dilemma on 18F-FDG PET/CT.
abstract: Amyloidosis associated with Langerhans cell histiocytosis (LCH) is extremely rare. We here present the 18F-FDG PET/CT images of a 48-year-old male patient with multifocal skeletal involvement of LCH. In addition, he had a left lung upper lobe 18F-FDG avid mass that was misinterpreted as pulmonary involvement of LCH on PET/CT. Biopsy from the mass showed amyloidosis. Therefore, amyloidosis should be kept as a differential for 18F-FDG pulmonary avid nodule.
authors.affiliation: From the *Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi; and †Department of Pathology, Sanjay Gandhi Post Graduate Institute, Lucknow, India.
authors.forename: Anirban
authors.initials: A
authors.lastname: Mukherjee
authors.forename: Varun Singh
authors.initials: VS
authors.lastname: Dhull
authors.forename: Punit
authors.initials: P
authors.lastname: Sharma
authors.forename: Girish Kumar
authors.initials: GK
authors.lastname: Parida
authors.forename: Sachin
authors.initials: S
authors.lastname: Jain
authors.forename: Lily
authors.initials: L
authors.lastname: Pal
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
mesh_terms: D000686:Amyloidosis / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging; D019788:Fluorodeoxyglucose F18; D006646:Histiocytosis, Langerhans-Cell / Q000150:complications*; D006801:Humans; D008171:Lung Diseases / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed
chemical_list: D019788:Fluorodeoxyglucose F18